<!-- Common header -->
<html>
  <head>
    <title>Hello 1</title>
    <style type="text/css">
      /* common css */
      body { padding: 20px; }
    </style>
  </head>
  <body>

    <h1 style="text-align:center">Hello 1</h1>

    <!-- body -->
    <p>Very simple document.</p>
    <!-- end of body -->

  </body>
</html>
<!-- Common footer -->